21247876

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{317}}^1\times {\mathrm{1289}}^1$

素因数の和:1623

約数の個数: 24

約数和(自身を含む): 40201560

約数和(自身を除く): 18953684

約数列:

[1, 2, 4, 13, 26, 52, 317, 634, 1268, 1289, 2578, 4121, 5156, 8242, 16484, 16757, 33514, 67028, 408613, 817226, 1634452, 5311969, 10623938, 21247876]

約数ペア:

[(1, 21247876), (2, 10623938), (4, 5311969), (13, 1634452), (26, 817226), (52, 408613), (317, 67028), (634, 33514), (1268, 16757), (1289, 16484), (2578, 8242), (4121, 5156)]